It's a one week boost with no signs of stability above 50k WW for a while...expect numbers to return in a few weeks.
Everyone did the same with Persona 4 and Gravity Rush week, where Vita sold 85k. However, the following week it was back around 50k and just kept dropping to (likely if overtracked by nearly 400-500k) 30k a week WW. Now, I expect the fall to be slower and a higher min point of 40ish k, but a heavy fall it will be, and saved it is not.
Also see Wii sales at DQX launch, they were 100k that week nearly, now look at the sales...







